Advertisement.

EnchantedLearning.com is a user-supported site.
As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages.
Click here to learn more.

ad
(Already a member? Click here.)


You might also like:
Paleontology and Geology Glossary: XPaleontology and Geology Glossary: Pl to PoPaleontology and Geology Glossary: EPaleontology and Geology Glossary: MaDinosaur Information Sheets: Non-DinosaursToday's featured page: The Wright Brothers Cloze Activity



ZoomDinosaurs.com
Dinosaur and Paleontology Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Click on an underlined word for more information on that subject.
If the dinosaur or paleontology term you are looking for is not in the dictionary, please e-mail us.

Si
Sa Sc Se Sh Si Sk-Sq St Su-Sz



SIAMOSAURUS

(pronounced si-AM-oh-SAWR-us) Siamosaurus (meaning "Siamese lizard") was a large, sail-backed, early spinosaurid theropod from the early Cretaceous period. This meat-eating biped was named by paleontologists Buffetaut and Ingavat in 1986 and found in Thailand. The type species is S. suteethorni.


SIAMOTYRANNUS

(pronounced sie-AM-oh-ti-RAN-us) Siamotyrannus (meaning "Siamese tyrant") was a tyrannosaurid theropod from the early Cretaceous period. Fossils were found in northeast Thailand. This meat-eating biped was named by paleontologists Buffetaut, Suteethorn, and Tong in 1996.

SICKLE-LIKE CLAW

Some theropod dinosaurs, including the dromaeosaurids (eg., Velociraptor, Utahraptor, and Deinonychus) and Megaraptor were armed with a sickle-like claw on each hind foot, making them deadly predators. These sharp claws, varying in length from a few inches to over 14 inches (35 m), could eviscerate prey easily. When alive, this claw would have been sheathed in a horny, keratinous material much like our fingernails, making the claw even bigger, longer and sharper.
SIGNOR-LIPPS EFFECT
The Signor-Lipps Effect explains how a fossil record that appears to be a gradual extinction can actually represent a sudden extinction. If many organisms go extinct at the same time, the fossil record wouldn't necessarily represent the rarer species and the more common equally. The rarer species might disappear from the fossil record long before the time of extinction, simply due to chance.


SILUOSAURUS

(pronounced suh-LOO-oh-SAWR-us) Siluosaurus (meaning "Silk Road lizard") was a hypsilophodontid ornithopod from the early Cretaceous period. Siluosaurus is known from only two teeth that were found along the ancient Silk Road in China. This plant-eater was named by paleontologist Dong in 1996. THe type species is S. zhangqiani.

SILURUAN PERIOD

(pronounced si-LURE-ee-en) The Silurian Period lasted from 438 million to 408 million years ago. The first jawed fishes and uniramians (like insects, centipedes and millipedes) appeared during the Silurian (over 400 million years ago). The first vascular plants (plants with water-conducting tissue as compared with non-vascular plants like mosses) appeared on land (Cooksonia is the first known vascular plant). During this time, there were high seas worldwide until the end of the Silurian. Brachiopods, crinoids, corals, and eurypterids (sea scorpions) lived in the seas. The Silurian was named for the Silures, an ancient Celtic tribe that lived in southeastern Wales in ancient times.


SILVISAURUS

(pronounced SILL-vah-SAWR-us) Silvisaurus (meaning "forest lizard") was a primitive, armored dinosaur with no tail clubs. It was about 13 feet (4 m) long and had a long neck (relative to its relatives, the ankylosaurs). It had balloon-like sinuses (cavities within its head) that may have amplified sounds, letting Silvisaurus make loud, reverberating noises. This quadrupedal plant-eater dates from the early Cretaceous period, about 116 million to 113 million years ago. This nodosaurid ankylosaur was named by paleontologist Eaton in 1960 from a partial skeleton found in Kansas, USA.


SINORNITHOIDES

Sinornithoides (meaning "Chinese bird form") was a troodontid dinosaur found in Inner Mongolia, Asia. Sinornithosaurus lived during the middle Cretaceous period, roughly 110 to 100 million years ago. The type species is S. youngi. Sinornithosaurus was named by D. A. Russell and Dong Zhiming in 1994.


SINORNITHOSAURUS

Sinornithosaurus millenii (meaning "Chinese bird lizard of the millennium") was a dromaeosaurid dinosaur recently found in northeast China. This fossil had traces of downy fibers on its skin. Sinornithosaurus lived during the middle Jurassic period, roughly 124 million years ago. Sinornithosaurus was named by Wu, et. al, in 1999.

SINOSAUROPTERYX

(pronounced SINE-oh-sawr-OP-ter-iks) Sinosauropteryx (meaning "Chinese lizard with feathers") was a feathered theropod dinosaur from the late Jurassic period. It was about 3.3 feet (1 m) long. Fossils (including 2 complete adult skeletons, one juvenile skeleton, and tissue impressions) have been found in China. It was named by Ji Q. & Ji S. in 1996.

SINRAPTOR

(pronounced SINE-rap-tor) Sinraptor (meaning "Chinese plunderer") was a large theropod dinosaur from the late Jurassic period, roughly 155-144 million years ago. This carnosaur was about 23 feet (7 m) long. A meat-eater, it walked on two powerful legs, had short arms, a long snout, and sharp teeth. Fossils (including a nearly complete skeleton) were found near Jiangjunmiao, in N.W. China. Sinraptor was named by Phillip Currie and Zhao, 1994. The type species is S. dongi.

Si
Sa Sc Se Sh Si Sk-Sq St Su-Sz

ZoomDinosaurs.com
Dinosaur and Paleontology Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Click on an underlined word for more information on that subject.
If the dinosaur or paleontology term you are looking for is not in the dictionary, please e-mail us.

Enchanted Learning®
Over 35,000 Web Pages
Sample Pages for Prospective Subscribers, or click below

Overview of Site
What's New
Enchanted Learning Home
Monthly Activity Calendar
Books to Print
Site Index

K-3
Crafts
K-3 Themes
Little Explorers
Picture dictionary
PreK/K Activities
Rebus Rhymes
Stories
Writing
Cloze Activities
Essay Topics
Newspaper
Writing Activities
Parts of Speech

Fiction
The Test of Time
iPhone app
TapQuiz Maps - free iPhone Geography Game

Biology
Animal Printouts
Biology Label Printouts
Biomes
Birds
Butterflies
Dinosaurs
Food Chain
Human Anatomy
Mammals
Plants
Rainforests
Sharks
Whales
Physical Sciences: K-12
Astronomy
The Earth
Geology
Hurricanes
Landforms
Oceans
Tsunami
Volcano
Languages
Dutch
French
German
Italian
Japanese (Romaji)
Portuguese
Spanish
Swedish
Geography/History
Explorers
Flags
Geography
Inventors
US History

Other Topics
Art and Artists
Calendars
College Finder
Crafts
Graphic Organizers
Label Me! Printouts
Math
Music
Word Wheels

Click to read our Privacy Policy

E-mail


Enchanted Learning Search

Search the Enchanted Learning website for:



Advertisement.



Advertisement.



Advertisement.


Copyright ©1996-2016 EnchantedLearning.com ------ How to cite a web page